A bicycle is sold at a gain of 27%. If it had been sold for Rs. 45 more, 31% would have been gained. What is the cost price of the cycle?

31-27=4 45*100/4 =1125

A person bought 110 glass bowls at a rate of Rs. 15 per bowl. He sold 101 of them at Rs. 17 and the remaining broke. What is the percentage gain for him?

A sum was invested for 3 years at simple interest at a certain rate, had it been invested at 4% higher rate of interest, it would have fetched Rs 600 more. What was the sum invested?